import dayjs from 'dayjs';

const formatTime = (date, template) => dayjs(date).format(template);

/**
 * 格式化价格数额为字符串
 * 可对小数部分进行填充，默认不填充
 * @param price 价格数额，以分为单位!
 * @param fill 是否填充小数部分 0-不填充 1-填充第一位小数 2-填充两位小数
 */
function priceFormat(price, fill = 0) {
	if (isNaN(price) || price === null || price === Infinity) {
		return price;
	}

	let priceFormatValue = Math.round(parseFloat(`${price}`) * 10 ** 8) / 10 ** 8; // 恢复精度丢失
	priceFormatValue = `${Math.ceil(priceFormatValue) / 100}`; // 向上取整，单位转换为元，转换为字符串
	if (fill > 0) {
		// 补充小数位数
		if (priceFormatValue.indexOf('.') === -1) {
			priceFormatValue = `${priceFormatValue}.`;
		}
		const n = fill - priceFormatValue.split('.')[1]?.length;
		for (let i = 0; i < n; i++) {
			priceFormatValue = `${priceFormatValue}0`;
		}
	}
	return priceFormatValue;
}

/**
 * 获取cdn裁剪后链接
 *
 * @param {string} url 基础链接
 * @param {number} width 宽度，单位px
 * @param {number} [height] 可选，高度，不填时与width同值
 */
const cosThumb = (url, width, height = width) => {
	if (!url) {
		return '';
	}
	if (url.indexOf('?') > -1) {
		return url;
	}

	if (url.indexOf('http://') === 0) {
		url = url.replace('http://', 'https://');
	}

	return `${url}?imageMogr2/thumbnail/${~~width}x${~~height}`;
};

const get = (source, paths, defaultValue) => {
	if (typeof paths === 'string') {
		paths = paths
			.replace(/\[/g, '.')
			.replace(/\]/g, '')
			.split('.')
			.filter(Boolean);
	}
	const { length } = paths;
	let index = 0;
	while (source != null && index < length) {
		source = source[paths[index++]];
	}
	return source === undefined || index === 0 ? defaultValue : source;
};
let systemWidth = 0;
/** 获取系统宽度，为了减少启动消耗所以在函数里边做初始化 */
export const loadSystemWidth = () => {
	if (systemWidth) {
		return systemWidth;
	}

	try {
		({ screenWidth: systemWidth, pixelRatio } = wx.getSystemInfoSync());
	} catch (e) {
		systemWidth = 0;
	}
	return systemWidth;
};

/**
 * 转换rpx为px
 *
 * @description
 * 什么时候用？
 * - 布局(width: 172rpx)已经写好, 某些组件只接受px作为style或者prop指定
 *
 */
const rpx2px = (rpx, round = false) => {
	loadSystemWidth();

	// px / systemWidth = rpx / 750
	const result = (rpx * systemWidth) / 750;

	if (round) {
		return Math.floor(result);
	}

	return result;
};

/**
 * 手机号码*加密函数
 * @param {string} phone 电话号
 * @returns
 */
const phoneEncryption = (phone) => {
	return phone.replace(/(\d{3})\d{4}(\d{4})/, '$1****$2');
};

// 内置手机号正则字符串
const innerPhoneReg =
	'^1(?:3\\d|4[4-9]|5[0-35-9]|6[67]|7[0-8]|8\\d|9\\d)\\d{8}$';

/**
 * 手机号正则校验
 * @param phone 手机号
 * @param phoneReg 正则字符串
 * @returns true - 校验通过 false - 校验失败
 */
const phoneRegCheck = (phone) => {
	const phoneRegExp = new RegExp(innerPhoneReg);
	return phoneRegExp.test(phone);
};

module.exports = {
	formatTime,
	priceFormat,
	cosThumb,
	get,
	rpx2px,
	phoneEncryption,
	phoneRegCheck,
};
